package lab02.test36;

public class PostGraduate extends Student {


    @Override
    String calGrade() {
        double avg = avg();
        if (avg >= 90 && avg <= 100)
            grade = "优秀";
        else if (avg >= 80 && avg < 90)
            grade = "良好";
        else if (avg >= 70 && avg < 80)
            grade = "一般";
        else if (avg >= 60 && avg < 70)
            grade = "及格";
        else if (avg <60)
            grade = "不及格";
        return grade;

    }
}

